The Helios Fans RSK 200 is an automatic backdraught flap designed for direct insertion into circular duct systems. It ensures one-way airflow by automatically closing under reverse pressure conditions, helping to prevent backflow of air within ventilation systems.
Built for reliable performance, the RSK 200 features a durable galvanized sheet steel housing with corrosion-resistant aluminum flaps and a stainless steel return spring. The unit is engineered to operate automatically in both underpressure and overpressure scenarios. For horizontal airflow installations, the axis of rotation should be vertical. In vertical ducting, the flap functions properly only in upward (ascending) airflow conditions.
Ideal for commercial and residential ventilation systems, the Helios RSK 200 is a dependable solution to control airflow direction and maintain system efficiency.